Fix links to GitHub Actions
Fix links to GitHub Actions

Summary:
Links to GitHub Actions are currently broken:

> We are having problems searching workflow runs. The results may not be complete.

Moreover, we don't actually need to use search in those links so replace them with the direct ones.

Reviewed By: Mizuchi, iahs

Differential Revision: D35720841

fbshipit-source-id: e3f67a0f2356178e652d4df8d05d2c1da50f8463

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift